The problem I have is that the former owner of the car used them as an early form of parking sensor

but I am now starting to notice rust braking through the wheels in the center, away from the scratched rims. They have a detailed machine finish and I would like to get them refurbed to the same finish, this would meen removing the tyres, striping them, then diamond cuting the new finish then recoating them. So I don't think a mobile guy could do it, but I might be wrong...
I can't seem to find the offset data in the manuals

ho hum...